package com.iot.core.util;

import eu.bitwalker.useragentutils.UserAgent;
import jakarta.servlet.http.HttpServletRequest;

import java.net.InetAddress;
import java.net.UnknownHostException;

public class RequestUtil {
    public static String getIpAddr(HttpServletRequest request) {
        String ipAddress = null;
        try {
            ipAddress = request.getHeader("x-forwarded-for");
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("WL-Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getRemoteAddr();
                if (ipAddress.equals("127.0.0.1")) {
                    // 根据网卡取本机配置的IP
                    InetAddress inet = null;
                    try {
                        inet = InetAddress.getLocalHost();
                    } catch (UnknownHostException e) {
                        e.printStackTrace();
                    }
                    ipAddress = inet.getHostAddress();
                }
            }
            // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
            if (ipAddress != null && ipAddress.length() > 15) { // "***.***.***.***".length()
                // = 15
                if (ipAddress.indexOf(",") > 0) {
                    ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
                }
            }
        } catch (Exception e) {
            ipAddress="";
        }
        // ipAddress = this.getRequest().getRemoteAddr();

        return ipAddress;
    }
    public  static  RequestClientInfo getClientInfo(HttpServletRequest request){
        var r=new RequestClientInfo();
        r.setIP(getIpAddr(request));

        try {

            UserAgent userAgent = UserAgent.parseUserAgentString(request.getHeader("user-agent"));
            String clientType = userAgent.getOperatingSystem().getDeviceType().toString();
            r.setClientType(clientType);


            String os = userAgent.getOperatingSystem().getName();
            r.setOs(os);

            String browser = userAgent.getBrowser().toString();
            if(browser.length()>40){
                browser=browser.substring(0,40);
            }
            r.setBrowser(browser);
        }
        catch (Exception ex){

        }
        return r;

    }

}
